Method decodeNextLayer

packet/network.go:85–133

()

)

func (p *Packet) decodeNextLayer() error {

	var (
		proto int
		len   int
	)

	switch p.L3.(type) {
	case IPv4Header:
		proto = p.L3.(IPv4Header).Protocol
	case IPv6Header:
		proto = p.L3.(IPv6Header).NextHeader
	default:
		return errUnknownL3Protocol
	}

	switch proto {
	case IANAProtoICMP, IANAProtoIPv6ICMP:
		icmp, err := decodeICMP(p.data)
		if err != nil {
			return err
		}

		p.L4 = icmp
		len = 4
	case IANAProtoTCP:
		tcp, err := decodeTCP(p.data)
		if err != nil {
			return err
		}

		p.L4 = tcp
		len = 20
	case IANAProtoUDP:
		udp, err := decodeUDP(p.data)
		if err != nil {
			return err
		}

		p.L4 = udp
		len = 8
	default:
		return errUnknownTransportLayer
	}

	p.data = p.data[len:]

	return nil
}

func (p *Packet) decodeIPv6Header() error {
	if len(p.data) < IPv6HLen {